FLET'S Hikari Cross has a high speed of 10Gps, but as of November 13, 2021, it seems that the telephone and fax functions cannot be used. It seems that it will be supported in a future version upgrade. Since it has a TV terminal, you can see terrestrial digital broadcasting, BS, and CS if you make a contract. World record update with NICT and optical transmission 2.7 times the conventional record for communication system infrastructure after "Beyond 5G". Google to provide free high-speed internet service to low-income households.

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NICT breaks world record with optical transmission 2.7 times more than conventional record For communication system infrastructure after "Beyond 5G"

https://news.mixi.jp/view_news.pl?id=6563244&media_id=32

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June 21, 2021 19:32   ITmedia NEWS

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Photo NICT experimental results and transmission capacity and transmission distance of conventional standard outer diameter optical fibers

　The Information and Communication Research Organization (NICT) announced on June 21 that it has succeeded in transmitting data at 319 terabits per second (Tbps) for 3001 km using a commercially available 4-core optical fiber for research and development with a standard outer diameter. The transmission capacity is said to be about 2.7 times the world record that NICT had so far. It is expected to be put into practical use after 2025 at the earliest as the basis of the backbone communication system after "Beyond 5G".

[Other images]

　In optical communication, when data is transmitted over a long distance, the optical signal is gradually damaged, so it is necessary to amplify the signal. This was possible in the wavelength bands (C band and L band) that have been used so far, but the wavelength band (S band) used in this experiment does not involve optical amplification technology and can only transmit about several tens of kilometers. There was a challenge.

　The new technology utilizes wavelength division multiplexing technology that sends optical signals of different wavelengths to a single optical fiber after widening the bandwidth by using the S band in addition to the C band and L band, and multiple amplification methods. Succeeded in long-distance, large-capacity transmission of 319Tbps and 3001km. The "product of transmission capacity and distance," which is a general standard for indicating transmission capacity, is 957 petabits per second x km, which is about 2.7 times that of conventional recording.

　NICT expects that the technology will be useful for building mission-critical communication systems after Beyond 5G, which is expected to increase traffic. 

Google to provide the Internet to low-income earners for free. Google to offer free internet to low-income earners. Google 은 저 소득 층에 인터 넷을 무료 제공 에.

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